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A ray of light incident on a glass sphere (refractive index √3) suffers total internal reflection before emerging out exactly parallel to the incident ray. The angle of incidence was

Optical Fibres are related to…

Pick out the correct statements about optical fibres from the following

A glass slab of thickness 3 cm and refractive index 3/2 is placed on ink mark on a piece of paper. For a person looking at the mark at a distance 5.0 cm above it, the distance of the mark will appear to be

Each quarter of a vessel of depth H is filled with liquids of the refractive indices n1, n2, n3 and n4 from the bottom respectively. The apparent depth of the vessel when looked normally is

The angles of incidence and refraction of a monochromatic ray of light of wavelength at an air glass interface are i and r, respectively. A parallel beam of light with a small spread δλ in wavelength about a mean wavelength is refracted at the same air glass interface. The refracted index μ of glass depends on the wavelength as μ(λ) = a + b/λ² where a and b are constant. Then the angular spread in the angle of refraction of the beam is

On a glass plate a light wave is incident at an angle of 60°. If the reflected and the refracted waves are mutually perpendicular, the refractive index of material is

Which of the following graphs show appropriate variation of refractive index u with wavelength λ

The wavelength of sodium light in air is 5890 Å. The velocity of light in air is 3 * 10 ^ 8 * m * s ^ – 1 The wavelength of light in a glass of refractive index 1.6 would be close to

Monochromatic light of wavelength 589 nm is incident from air on a water surface. The refractive index of water is 1.33. The wavelength of the refracted light is

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